Secondary or storage battery



B. FORD SECONDARY OR STORAGE BATTERY Filed May 2, 1927 //VVE A 70/?Patented Jan; 24, 1923.

BR'UGEI'QBD, or rmmmm, IEIlNSXLVfANIL SECGNDABY OR STORAGE BATTllBY.

' Application filed Iay 221927. eria1:1i'o. 188,075.

The present inventionrelatesw to an im-.

7 proved sealing closure for'the hard rubber cell wall and thelead alloyflange-of the conductor of a storage battery, and one ohject of theinvention is to prevent leakage or even capillary seepage, and to'thisand other ends hereinafter 'set forth the invention comprises a gasketsurrounding the conductor and interposed between the hard rub-- her'wall and the flange and composed of a rubber compound primarily and atassembly partly, vulcanized, a'ndi inherently adapted after assembly andundericompressionbe- 1 cell wall and the lead alloy flange of the tiveenthe surfaces of the cover'and flange to furtherivulcanize-itself fast tothose sun- I .faces and prevent lea-liege and capillary seepage.' e

- The invention further (comprises the improvements to be presentlydescribed and Reference be made to the single figure of the accompanyingdrawing which is a sectional viewgillus'tratmg a closure embodyingfeatures off'the invention.

In the drawing -1 -'is the hard rubber cover through which passes aterminal post 2 provided on the under side of the cover witha flange 3.4 is a means-efor'pressing the cover toward the flange. 3c Interposedbetween the flange and cover is a gasket 5 and according to my inventionthis asket is composed of a rubber compound ,which is either ,selfvulcanizing or 15 only partly vulcanized and-aria ted to furthervulcanize with lieat or age. ubber 7 material of this character whentightly held by compression agaiinst either a metal sur; face or a hardrubber surface will itself fast to those surfaces and preventleaka'ge'or even capillary seepage. The gasket 4 5' of thedescribedmaterial and characteristics and qualities can eltherbe a.loose piece or it may be made integral with the hard rubber cover whilemolding .the' latter.

This can be taken care of inthe nature of the compounds used for thecover orv by par tially vulcanizing the cover before inserting thegasketinto the mold andfinishing thevulcanizing'of the cover, which onlypar tially vulcanizes the gasket.

lelaimg' '-1. A sealing closure for the hard. rubber conductor of astorage battery, whi h comprises a gasket surrounding the conductorandinterposed between the hard rubber wall. and the flange and composed ofa rubber compound primarily and at assembly only partially andinherently adapt.

ed after assembly and under compression between, the surface of thecover and flange to further vulcanize itself fast to those surfaces andprevent leakage and capillary seepage. 1 o

2. A. sealing closure for the hard rubber cell wall and the lead alloyflan e of the conductor of a storage battery; which comprises a gasketintegral with the cover and surrounding the conductor and interposedbetween the hard rubber wall andthe flange T l and composed of a rubbercompound primarily and at assembly only (partially vul 4 ca'nizcd andinherently adapte after assem- 'bly and under compression between thesur iace of the cover and flange toiurther vull canize itself fast tothose surfaces and pre- 1 7 vent leaka and eapillary'seepage;

' j ge FORD.

